- a variation of behavior.
behaviour
Americannoun
noun
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manner of behaving or conducting oneself
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behaving with careful good manners
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psychol
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the aggregate of all the responses made by an organism in any situation
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a specific response of a certain organism to a specific stimulus or group of stimuli
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the action, reaction, or functioning of a system, under normal or specified circumstances
Spelling
See -or 1.
Other Word Forms
Etymology
Origin of behaviour
C15: from behave ; influenced in form by Middle English havior , from Old French havoir , from Latin habēre to have
Explanation
Your behaviour is the way you act in various situations. Note that this word ends with "our," which is the British spelling, while the American English spelling is behavior. This discrepancy is common, and either spelling is correct. The Late Middle English word behavoure meant "to have possession," which seemingly refers to a person in control of his or her actions. If you are accused of childish behaviour, you might be acting as though you have little self-control. Scottish musician Shirley Manson once said: "A lot of celebrities just want money, fame, power, fancy cars, houses all over the world and have people bow down to them. To me, that's frightful behaviour."
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
"If they want to repair their image and the relationship, their future actions and behaviour will be key."
From Barron's ● Oct. 29, 2026
Russell Brand has said a documentary that made allegations about his behaviour had a "devastating" effect on him, and made friends and colleagues turn against him.
From BBC ● Oct. 28, 2026
"These medicines are prescribed following clinical assessment and form part of a wider dietetic-led programme supporting long-term behaviour change and healthier lifestyles. Patients are reporting and we are seeing significant clinical benefit."
From BBC ● Oct. 28, 2026
It comes as new data from the Housing Ombudsman showed a rise over five years in the number of complaints upheld about social landlords' handling of anti-social behaviour.
From BBC ● Oct. 27, 2026
There is no one worthy of eating him from the manner of his behaviour and his great dignity.
From "The Old Man and The Sea" by Ernest Hemingway
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Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.